When you view the Event log entries from a mixed cluster on the Windows 2000 Server node, information appears to be missing, as in:
Event Type: Error
Event Source: ClusSvc
Event Category: Object Mgr
Event ID: 1069
Description: Cluster resource <A Resource> in Resource Group '%2' failed.
You would expect '%2' to display a group name.
The Cluster Service replicates Event log entries to all nodes in the cluster. If the Windows Server 2003 node generated the entry, it will contain 2 arguments. Since Windows 2000 Server only uses 1 argument, it doesn't know what to display.
To workaround this behavior, view the Event log entry on the Windows Server 2003 node.